<template>
  <view v-if="goods_info.goods_name" class="goods-detail-container">
    <!-- 1. 轮播图区域 -->
    <swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" :circular="true">
      <swiper-item v-for="(item,i) in goods_info.pics" :key="i">
        <image :src="item.pics_big" @click="preview(i)"></image>
      </swiper-item>
    </swiper>
    <!-- 2. 显示商品信息区 -->
    <view class="goods_box">
      <!-- 商品价格区 -->
      <view class="goods_price">￥{{goods_info.goods_price}}</view>
      <!-- 商品名称及收藏区 -->
      <view class="goods_body">
        <!-- 商品名称 -->
        <view class="goods_name">{{goods_info.goods_name}}</view>
        <!-- 收藏区 -->
        <view class="favi">
          <uni-icons type="star" size="18" color="gray"></uni-icons>
          <text>收藏</text>
        </view>
      </view>
      <!-- 运费区 -->
      <view class="yf">
        快递：免运费
      </view>
    </view>

    <rich-text :nodes="goods_info.goods_introduce"></rich-text>

    <view class="goods-nav">
      <uni-goods-nav :fill="true" :options="options" :buttonGroup="buttonGroup" @click="onClick" @buttonClick="buttonClick" />
    </view>
  </view>
</template>

<script>
  import {mapState,mapMutations,mapGetters} from "vuex"
  export default {
    computed:{
      ...mapState('m_cart',[]),           // 映射state对象
      ...mapGetters('m_cart',['total'])   // 映射getters
    },
    // 监听total值的变化,从而修改购物车数量（info属性值）
    watch:{
      total:{
        handler(newV){
          const findResult = this.options.find(x => x.text === '购物车')
          if(findResult){
            findResult.info = newV
          }
        },
        // immediate 属性用来声明此侦听器，是否在页面初次加载完毕后立即调用
        immediate: true
      }
    },
    data() {
      return {
        // 商品详情
        goods_info: {},
        options: [ {
          icon: 'shop',
          text: '店铺',
          infoBackgroundColor: '#007aff',
          infoColor: "red"
        }, {
          icon: 'cart',
          text: '购物车',
          info: 0
        }],
        buttonGroup: [{
            text: '加入购物车',
            backgroundColor: '#ff0000',
            color: '#fff'
          },
          {
            text: '立即购买',
            backgroundColor: '#ffa200',
            color: '#fff'
          }
        ]
      }
    },
    onLoad(options) {
      const goods_id = options.goods_id
      this.getGoodsInfo(goods_id)
    },
    methods: {
      // 将m_cart模块中的addToCart方法引入当前页面中（映射mutations对象）
      ...mapMutations("m_cart",["addToCart"]),
      async getGoodsInfo(goods_id) {
        const {
          data: res
        } = await uni.$http.get("/api/public/v1/goods/detail", {
          goods_id
        })
        if (res.meta.status !== 200) return uni.$showMsg()
        // 处理图片下的空格
        res.message.goods_introduce = res.message.goods_introduce.replace(/<img /g, '<img style="display:block"').replace(
          /webp/g, "jpg")
        this.goods_info = res.message
      },
      preview(i) {
        uni.previewImage({
          current: i,
          urls: this.goods_info.pics.map(m => m.pics_big)
        })
      },
      onClick(e){
        if(e.content.text === "购物车"){
          uni.switchTab({
            url:'/pages/cart/cart'
          })
        }
      },
      // 点击右侧的按钮
      buttonClick(e){
        if(e.content.text === '加入购物车'){
          // 1. 创建商品对象
           // { goods_id, goods_name, goods_price, goods_count, goods_small_logo, goods_state }
          const goods = {
           goods_id: this.goods_info.goods_id,
           goods_name: this.goods_info.goods_name,
           goods_price: this.goods_info.goods_price,
           goods_count: 1,
           goods_small_logo: this.goods_info.goods_small_logo,
           goods_state: true
          }
          console.log("goods:",goods)
          this.addToCart(goods)       
        }
      }
    }
  }
</script>

<style lang="scss">
  swiper {
    height: 750rpx;

    image {
      width: 100%;
      height: 100%;
    }
  }

  .goods_box {
    .goods_price {
      padding: 5px;
      color: #f00;

    }

    .goods_body {
      display: flex;
      justify-content: space-between; // 盒子两端对齐

      .goods_name {
        font-size: 13px;
        margin-right: 10px;
        margin-left: 5px;
      }

      .favi {
        width: 120px;
        font-size: 12px;
        display: flex;
        flex-direction: column; // 盒子垂直对齐
        align-items: center; // 水平居中
        justify-content: center; // 垂直居中
        border-left: 1px solid #f0f0f0;
        color: gray;
      }
    }

    .yf {
      font-size: 13px;
      color: gray;
      margin-top: 10px;
      margin-left: 3px;
    }

  }
  .goods-nav{
    position: fixed;
    left:0;
    bottom: 0;
    width: 100%;
  }
  .goods-detail-container{
    padding-bottom: 50px;
  }
</style>
